Structural material



March 25, 1930. T. H. KANE STRUCTURAL MATERIAL Filed Dec. 21, 1925 BY amATTORN EY Patented Mar. 25, 1930 UNITED STATES;

PATENT OFFICE THOMAS H. KANE, OF YOUNGSTOWN, OHIO, ASSIGNOR T TRUSCONSTEEL COMPAN Y, OF YOUNGSTOWN, OHIO, A CORPORATION OF MICHIGANSTRUCTURAL MATERIAL Application filed December 21, 1925. Serial No.76,665.

The present invention relates to structural materials for buildings andparticularly to materials adapted for roofing and for flooring intendedto support light loads.

v .Among the objects of the invention is a material for the purposesspecified which is easily and economically made and used and whichcontains little or no excess material.

Another object is a material for the purpose indicated which shall bevery light in weight but sufliciently strong and which may be producedfrom light weight and gauge materials.

With these and other objects in view as 5 will more clearly hereinafterappear, the invention consists broadly in a rolled metal sheet of smallthickness having secured to one side thereof stiffening ribs formed ofsimilar material by means of which the sheets are adapted to besupported upon suitable joists or the like. ,The sheets preferably havesecured to the other side a moderately thick layer of fiber-board orother suitable sound and heat insulating material, and this may befurther" covered with waterproofing material, if desired, although bothof these la ers may be omitted.

eference should be made to the accompanying drawing, in which Fig. 1shows a section of one form of the material across the ribs;

Figs. 2 to 6 show similar sections of as many modifications thereof; and

Fig. 7 shows a fragmentary plan View of Fig. 6 from below.

The present invention may be regarded as an improvement over that shownin application Serial Number 39,227, filed June 24, 1925, for buildingconstruction by Julius Kahn.

Referring to the drawings, (Figs. 1 and 2), 10 indicates a continuousthin flat rolled sheet of metal having secured to one side thereof as byweldingthe ribs 11 and 12, these latter being formed of similar sheetmetal folded back upon itself to form a rib of I-section as at 11 orT-section as at 12.

Upon the other side of the sheet 10 may be secured, as by cementing, acomparatively thick sheet or'layer 13 of a heat and sound insulatingmaterial such as fiber-board, which acts as a compression member whenthe material is subjected to loading, the sheet metal 10 and ribs beingplaced under tension.

Fig. 3 shows a somewhat different form of that shown in Fig. 2. In thisform of material, the formed sheet metal rib 12 is sesecured as in Figs.3 and I, a different form of rib being shown. In this form of rib, the

,sheet metal 20 is formed into T-section but the edge of the web portion21 encloses a solid rib 22.

Fig. 6 shows a modification of the method of securing the rib to thesheet. In this figure the sheet 10 is provided with tongues 30 punchedout of the body thereof and spaced apart the width of the double flange31 of the formed rib. These tongues 30 are then pressed down over theedges of thedouble flange to secure the rib in place.

Having nowv described the invention and the preferred forms ofembodiment thereof,-

it is to be understood that the said invention is not to be limited tothe specific details here in set forth but only by the scope of theclaims which follow.

Claims 1. A roofing or flooring material comprising a continuous sheetof metal, a plurality of stiflening ribs therefor formed of sheet metalfolded to I or T shape, and means for securing adouble flange of saidribs to one side of said sheet, said means comprising folds formed I ofthe metal of said sheet crimped over the edges of said double flange.

2. Aroofing or floorin material comprising a continuous sheet 0% metal,a plurality of stiffening ribs therefor formed of sheet metal folded toI or T shape, means for securing a double flange of said ribs to oneside of said sheet, said means comprising folds formed of the metal ofsaid sheet crimped over the edges of said double flange,

and. a heat insulating layer secured to the other side of said sheet.

THOMAS KANE.

